#include <stdio.h>
#include <string.h>

int main(){
    char buf[512];
    buf[0] = 'a';
    buf[1] = 'b';
    buf[3] = 'c';
    char *p = &buf[1];

    printf("buflen %d\n", strlen(buf));
    printf("plen %d\n", strlen(p));
    return 0;
}